Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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197
AUUS46 KPDT 201239
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
439 AM PST SAT JAN 20 2018

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SW 6-11 MPH.      SW 10-16 MPH.
TRANSPORT WINDS               S-SW 6-11 MPH.      W 16-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN JAN 21        GOOD.

VENTILATION INDEX (CATEGORY)  39 (POOR).          662 (GOOD).
OUTLOOK FOR SUN JAN 21        219 (POOR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW-W 5-9 MPH.       SW 6-12 MPH.
TRANSPORT WINDS               SW-W 5-9 MPH.       SW 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN JAN 21        GOOD.

VENTILATION INDEX (CATEGORY)  28 (POOR).          275 (POOR).
OUTLOOK FOR SUN JAN 21        156 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRBL 3-5 MPH.       SW-W 4-6 MPH.
TRANSPORT WINDS               VRBL 3-5 MPH.       W 7-13 MPH.
MIXING HEIGHT                 4000 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN JAN 21        FAIR.

VENTILATION INDEX (CATEGORY)  57 (POOR).          262 (POOR).
OUTLOOK FOR SUN JAN 21        245 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      197 (POOR)
ELLENSBURG    103 (POOR)
GOLDENDALE    163 (POOR)
TRI-CITIES    379 (FAIR)
WALLA WALLA   680 (GOOD)
YAKIMA         77 (POOR)
BEND          394 (FAIR)
PRINEVILLE    327 (FAIR)
ENTERPRISE    291 (POOR)
HERMISTON     648 (GOOD)
JOHN DAY      393 (FAIR)
LA GRANDE     296 (POOR)
MADRAS        486 (FAIR)
MEACHAM       515 (FAIR)
PENDLETON     792 (GOOD)
REDMOND       405 (FAIR)
SENECA        444 (FAIR)
THE DALLES    141 (POOR)

METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS.  BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.

THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS.  A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTP://WWW.WRH.NOAA.GOV/PDT/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$



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